removed mcl input and output file cleanup

src/main/java/nl/wur/bif/pantools/construction/grouping/Grouping.java

@@ -724,8 +724,6 @@ public class Grouping {
                 //Pantools.logger.info(command);
                 if(executeCommand_for(command, wating_time))
                     break;
-                if((tmp_file = new File(clusters_path)).exists())
-                    tmp_file.delete();
                 wating_time += time;
             }
             if (infl >= 30) {
@@ -755,8 +753,6 @@ public class Grouping {
                                 homology_groups_list.put(singletons_group);
                         }
                         clusters_file.close();
-                        new File(clusters_path).delete();
-                        new File(graph_path).delete();
                     }catch (IOException ex) {
                         Pantools.logger.info(ex.getMessage());
                     }